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FORUMS Post Processing, Marketing & Presenting Photos RAW, Post Processing & Printing 
Thread started 04 Oct 2010 (Monday) 01:12
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Archiving from Lightroom by converting to DNG?

 
professorman
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Oct 04, 2010 01:12 |  #1

I normally archive my edited images from Lightroom unto an external hard drive, but first, I convert them to DNG. DNG stores the edits in the files themselves, so I can simply drag the dng files to the hard drive and viola, everything is stored. If I want to re-edit, I just import them back into Lightroom and lightroom edits are stored. The benefit of dng being 20% smaller was well welcomed as well.

Now, I am shooting my 5D2 in sraw, but when I convert to DNG, the file size almost double.

Does anyone have any other way I can archive my images where the edits are stored IN the file, similar to dng, but still be at least the same file size as the original sRAW?


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professorman
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Oct 04, 2010 01:14 |  #2

Here is someone who encountered the same problem with sRAW to dng conversion.
https://photography-on-the.net/forum/showthre​ad.php?t=628955


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tim
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Oct 04, 2010 02:30 |  #3

I don't know why, but when sRaw is converted to DNG the files get bigger. I archive in both DNG and the native RAW file, and given I now use 2TB hard drives it doesn't much matter if each image is 15MB or 30MB.

I also archive a copy as jpeg... just in case.


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FlyingPhotog
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Oct 04, 2010 02:35 |  #4

CR2 is Canon's nomenclature for RAW. Nikon's is NEF.


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tim
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Oct 04, 2010 02:55 |  #5

FlyingPhotog wrote in post #11029406 (external link)
CR2 is Canon's nomenclature for RAW. Nikon's is NEF.

You're absolutely right, but i'm confused about what you posted it...


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Oct 04, 2010 03:11 |  #6

tim wrote in post #11029478 (external link)
You're absolutely right, but i'm confused about what you posted it...

You said you archive in both CR2 and RAW so I was mearly pointing out that they are the same thing.


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tim
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Oct 04, 2010 03:15 |  #7

Ah I see, I made a typo. I archive in both DNG and native RAW, which for me is now NEF.


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Oct 04, 2010 03:16 |  #8

tim wrote in post #11029546 (external link)
Ah I see, I made a typo. I archive in both DNG and native RAW, which for me is now NEF.

Glad we cleared that up. ;)


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Victoria ­ Bampton
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Oct 04, 2010 09:07 |  #9

tim wrote in post #11029378 (external link)
I don't know why, but when sRaw is converted to DNG the files get bigger.

Because sRAW files aren't true raw files - they're half-baked. The sRAW format isn't covered by the DNG spec so the data has to be stored in a linear format which is always bigger. Here's the techie blurb: http://www.barrypearso​n.co.uk …ng/specificatio​n.htm#sRAW (external link)


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Oct 04, 2010 15:59 |  #10

Victoria Bampton wrote in post #11030686 (external link)
Because sRAW files aren't true raw files - they're half-baked. The sRAW format isn't covered by the DNG spec so the data has to be stored in a linear format which is always bigger. Here's the techie blurb: http://www.barrypearso​n.co.uk …ng/specificatio​n.htm#sRAW (external link)

Good to know, Victoria!


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Oct 04, 2010 20:49 |  #11

Thanks Victoria. It was a good explanation.


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tim
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Oct 05, 2010 03:08 |  #12

Interesting, thanks Victoria! :)


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Archiving from Lightroom by converting to DNG?
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